code: def _save_credentials_to_file(self, creds, file_path):
      with open(file_path, "w") as token:
          data = self._convert_credentials_to_dict(creds)
          token.write(json.dumps(data))
  
file_path: mindsdb/mindsdb/integrations/handlers/utilities/auth_utilities/google/google_oauth_utilities.py
imports: import os
  import json
  import requests
  import datetime
  from flask import request
  from shutil import copyfile
  from mindsdb.utilities import log
  from ..exceptions import AuthException
  from google_auth_oauthlib.flow import Flow
  from google.oauth2.credentials import Credentials
  from google.auth.transport.requests import Request
label_desc: Use image node_id 5 for calling the GoogleOAuth2Manager obj's underlying member method code with example usage: obj._save_credentials_to_file(creds, file_path) without return types